Bird brings more value with alloy Aether trail bike

Bird Aether trail bike
Aether 9 AL is a very slack 130mm 29er (Image credit: Bird)

British bike brand Bird has launched a metal version of its Aether 29er.

Using similar angles and suspension configuration as the Aether 9C, revealed earlier this year, the aluminum version is classified as a vastly capable trail bike.

Bird is big on progressive geometry, and they do a good job of not overwhelming their designs by simply adding more suspension travel. Designers at the company have recognized that the 130mm dual-suspension 29er is a great default trail bike configuration.

With the Aether 9 AL, Bird offers all the benefits of a responsive mid-travel 29er, at a lower price.

Unlike the 9 C, this aluminum version uses external brake and drivetrain cable routing, but the important design bits are all thoroughly contemporary.

Aether 9 130mm AL

(Image credit: Bird bikes)

Bold geometry for a 130mm bike

Bird believes that a quality trail bike is all about considered angles, and the Aether 9 AL is true to the longer, lower, and slacker theme.

Using a 140mm fork, it sits at a 65-degree head angle, and the front triangle geometry numbers are very generous. On a size large, you have a roomy 506mm of reach. 

The Aether 9 AL bikes might have longer front center specs, but all size variants run a similar 430mm chainstay, which allows for responsiveness and agility in tight corners.

Both the medium-long and large frames have only 700mm of standover height, and with trimmed seat tubes which are shaped with a straight profile, you can run a very long dropper post. 

The combination of a short seat tube and low standover allows riders to size up if they wish a longer more stable feeling bike as well as reduce their overall center of gravity when descending.

Bird claims that all but the smallest Aether 9 AL frame size fits a 200mm dropper seat post with ease, while the large and extra-large sizes can use droppers up to 213mm.

The company is offering frames starting at £1,100.00 and a range of build options, with Fox, Rockshox, SRAM, and Shimano components choices with complete bikes starting at £2,242.00, available at

Lance Branquinho
Freelance writer

Lance Branquinho is a Namibian-born journalist who graduated to mountain biking after injuries curtailed his trail running. He has a weakness for British steel hardtails, especially those which only run a single gear. As well as Bike Perfect, Lance has written for, and Cycling News.